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(No Model.) P. F; ANGERMAIR.

BARK STE-IPPING MACHINE. No. 300,829. Patented'June 24, 1884.

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' UNTTEn STATES PATENT @EETQE.

F. FERDINAND ANGERMAIR, OF RAVENSBURG, XVURTEMBERG, GERMANY.

BARK-STRIPPING MACHLNE.

SPECIFICATION forming part of Letters Patent No. 300,829,6ated June 24,1884.

Application filed July 18, 1883. (No model.) Patented in Germany August6, 1879, No. 8,529.

the bark from logs of wood used for the manufacture of paper-pulp, orfor other purposes. The machines hitherto used for this purpose beingeither complicated and expensive, or requiring a sacrifice of much timeand labor in 5 handling the logs, made it desirable to have a moreproductive and a simpler machine, and my invention therefore consists ina horizontally and'rapidly revolving disk, called the shaver, the centerportion of which is recessed, and the annular elevated portion isprovided with a suitable number of knives or blades, said knivesprojecting only little above the top face of the disk, and being placedobliquely relatively to the sense of rotation.

2 The axis of said disk or shaver receives its motion by asuitable modeof transmission from the driving-pulley, and projects above the disk,carrying on this projecting top part a wormgear, revolving thereby aroller, called the 0 feed-roller, which is placed horizontally acrossand close over the disk, and is provided with two rack-wheels serving toturn the logs placed on the shaver for being stripped of the bark.Thelogs are pressed down on the shaver 5 by a press-roller journaled toa suspended frame, said frame and roller being swung off from the logsorbrought to bear against them by means of a hand-lever. Thelogs,whenpressed down, are prevented from flying off the rapidly- 0revolving shaver by means of a flange provided on the left-hand side ofthe press-roller. Thus the logs, owing to the pressure of thepressroller, will be kept bearing against the rackwheels of thefeed-roller and the rapidly-re- 5 volving knives of the shaver, and willthere fore be effectively and quickly stripped or shaved from the barkon the side happening to be on the bottom, and will be constantly turnedin order to feed and to offer a new side to the shaving-knives.

My invention further consists in an attachment suitable for strippingalso shorter pieces or logs having not a circular but an irregular shapeof cross-section. This attachment consists in an oblong frame placedacross and close to the shaverdiametrically opposite the place where thelong logs are stripped. Within this frame two rows of balls are thusarranged at right angles to each other, that the logs placed by handinside of the frame bear against both rows, and are free to revolve orto turn accordingly. The advantage of my machine, therefore, is that,with exception of the very irregularly-shaped pieces, which will alwaysrequire a longer handling, the logs to be stripped of theirbark arehandled only once in my machine-to wit, when they are placed on theshaver-said logs being thrown off from the shaver by its centrifugalforce when lifting up the press-roller with flange. A further advantageis that the logs are always in sight of the attendant, and thus theexact time of the stripping can easily be known, and an unnecessaryworking over of the logs is prevented, which unneccessary working overis liable to occur in those machines where the logs have to be inclosedin a feed-casing. Finally, my machine bases on a better principle forthe stripping, as it isneither a grinding nor a cutting, but a shavingproper.

In the accompanying drawings, Figure 1 represents a part front elevationand part cross-section on the center line; Fig. 2, a side elevation;Fig. 3, a plan, and Fig. 4 a separate plan of the attachment for theshaving of the smaller pieces and logs of irregular shape.

Similar letters of reference in the different figures refer to similarparts.

a, a is the main frame of the machine, said frame being provided with across-beam, c,, and two vertical brackets, a, a bolted on top of (0,,said brackets a, carrying 1n slotted bearings b, the rigid axis 8,, onwhich axis 8 a frame-carrying press-roller, 19,, is swinging, the frameand axis being adjusted to the diameter. of logs by changing theposition of axis .9 within slot of bearings b,- b,, said frameconsisting in two arms 1), 1),, journaled on axis 8,, and connected by atruss-rod, s press-roller p journaled in lever-armsp and being providedon its left-hand end with flange 19,. Against said flange the logs willrest and will be prevented from following the centrigugal force of theshaver. Hand-lever Z is bolted to the right-hand arm 17,, and is limitedin its downward movement by a guard, g, screwed in the main frame of themachine, said guard preventing the flange p, of roller 12, from comingin contact with the shaver, which would otherwise cause much damage. Onthe crossbeam a, a bearing is provided for the vertical shaft 8, ofshaver D, b representing the socket-bearing, and g, g, a suitable deviceof deriving the power from driving-pulley d, said pulley keyed ontoshaft 8 said shaft revolving in bearings on pedestals b and 1),. Ahatshaped cover, h, prevents any particles of wood from dropping betweenthe cog-wheels, and is stationary, while shaft 8, is revolving. Shaft 8,carries at its top the worm W, engaging with corresponding threads onthe roller f, having a ratchet-shaped wheel, f rigidly fixed to each endthereof. Said ratchet-wheels engaging with the logs, and thereby turningthem over, will offer a new side still covered with bark to the actionof the shaverD. Feedroller f and ratchet-wheels are all revolving withshaft 8,, said shaft turning within bear,- ings 1), b bolted to thebrackets a, a,, said brackets a a, being provided with slots, in orderto v allow the feed-roller to be raised or lowered, according to thediameter of logs. The shaver D, being keyed onto shaft 8, abovebeama,,with bearings 12,, and underneath the worm W, is re,- volving atabout three hundred revolutions a minute in the sense indicated by thearrow, and consists in aheavy cast-iron disk recessed in the centerportion, partly because the velocity of this part is not sufficient tosecure a good result if provided with knives, and partly in order tohave the proper space for the ratchet-wheelsf when the feed-roller f isin its lowest position for very thin sticks or logs of wood. On theannular and elevated portion of disk D, and extending to the peripheryof the disk, a suitable number of knives, k -say five-areprovided,projectingvery little above the face of the disk, and beingplaced in aposition anteceding the radial position, and having a slot,7a,, running all along said knives for the passage of the shavings. Thelogs are placed on disk D, while lever Z is swung up. Then lever Z isswung rapidly down,and, while flange p, prevents the logs from flying 0Eby I what I claim as new, and want to secure by Letthe centrifugalforce, the pressure on roller 11, will bring the logs into contact withvratchetwheels f, which will force the log to revolve, the bottom part ofsaid logs being continuously stripped of all the bark until the logshave made one revolution, whereupon lever Z is swung up, and the logs,being now shaved perfectly bare of all bark, will be thrown offby thecentrifugal force of disk D.

The attachment A I (shown separately in plan, Fig. 4) is intended forsmall. pieces and for logs of irregular shape. Frame 6,, cast to plate0,, which leaves an open space within said frame, is bolted across diskD over that p0rbear against the balls by the movement of the disk D,whereupon the logs come to rest, and while the logs are held by hand,the balls 0, and e, facilitating the turning of the logs, disk D'withknives is, will shave the bottom part of the logs, said logs beingturned and handled until properly shaved from all bark.

I am well aware that it is not new to use in wood-shaving machines arotary horizontal disk provided with obliquely-placed knives orplane-irons, in combination with a set of feed rollers, saidrollers'feeding the log to be converted into shavings verticallydownward against the rotary knives. This arrangement would not answerfor my purpose, because, in order to remove nothing else but the bark,the log itself needs to be constantly revolved, and itis not to be fedvertically toward the knives,

but needs simply to be pressed into temporary contact with the knives inorder to give them a chance to tear orpeel off the bark.

I am aware, also, that itlis not new to use in machines for grindingbark a spurred feedroll journaled within the arms of a weighted andhinged leverfor the purpose of conveying the bark within reach of thecutting or grinding roller. This device may answer very well for feedingpieces of bark in said ma-,

chines, but would be unfit in combination with and for the purpose ofmymhine, wherethe logs need to be turned-or revolved until all barks-ispeeledoff, and where after this has beendone, the logs have to bequickly removed. In my machine, therefore, the logs,

jafterbeing placed on the shaving-table, are

held down and kept from being thrown off by the centrifugal force of thetable by means of a smooth roller "provided with a suitable flange andjournaled within hinged levers, and are revolved bya stationary rollerprovided with ratchet-shaped wheels, owing to the pressure exerted onthe logs by the journaled smooth roller and hinged levers, which rollerpresses the logs against the revolving ratchet-wheels, as well as downon, thetable.

Having thus fully described my invention,

ters Patent, is

1. In a bark-stripping-machine, the combination of a horizontal rotarydisk provided with; obliquely-set knives or blades, the disk mounted ona vertical shaft having a worm rigidly fixed thereto, said worm,engaging abovesaid diskwith a roller provided with ratchet-shapedwheels, a pair of hingedlevers provided with handle and flanged smoothroller journaled between the levers, to operate as shown, and for thepurpose set forth and described.

2. In a barkrstripping machine, the combithe rows set at right angles toeach other, to

nation. of the horizontal rotary disk D, pro- I Vided with theobliquely-set knives k disk D, mounted on the vertical shaft 8,, havingthe wormW rigidly fixed thereto, worm W, engaging above disk D with theroller f, provided with the ratchet-shaped wheels f 1 f,, the hingedlevers 10, 1),, provided with the handle Z, and'the flanged smoothroller p flange 1),, shaft 8,, substantially as'shown, and for thepurpose set forth and described.

' 3. In bark-stripping machines, the combination of a rotary diskprovided with vertical shaft, an attachment provided on top and acrossthe disk, the attachment rigidly fixed to the main frame of the machine,consisting of a frame with two rows of journaled balls,

operate as shown, and for the purpose set forth and described. 7

4. In a bark-stripping machine, the combination of the rotary disk D,provided with the knives 1a,, and rigidly secured to the vertical shaft8,, said shaft journaled in the bearings b, 1),, which are rigidly fastto the main frame a the attachment A, bolted to the frame a and placedclosely over and across disk D, said attachment consisting of frame 0plate 6,, and supporting a set of j ournaled balls arranged in the tworows 6 0,, set at right angles to each other, to operate as set forth,and substantially as shown and described.

In testimony whereof I hereunto sign my name, in the presence of twosubscribing witnesses, this 16th day of June, 1883.

F. FEED. ANGERMAIR.

Witnesses:

ALF. BIsoHoFF, BUD. MEYER.

